摘要
使用Al- 8Si(mass % )合金熔体对Ti3 Al基合金表面进行液相Al-Si共渗硅处理 ,在表层发生了不同程度的界面反应 ,经X射线能谱分析和对涂层的X射线衍射分析 ,推断涂层由TiAl3 及Ti-Si化合物组成 .经 10 13K/ 6min +983K/ 10min的二次改性处理 ,可明显改善Ti3 Al基合金的高温抗氧化性 .1173K/ 10 0h氧化后的涂层组织 ,分析表明 ,涂层改善基体抗高温氧化性的根本原因是在最外层生成了一薄层致密的Al2 O3 膜 .
The liquid-phase silicon-aluminizing was conducted for a Ti 3Al-based alloy by using Al-8Si(mass %)melt.The XRD analysis results showed that the coating was composed of TiAl 3 and TiSi compounds.The silico-aluminizing treatment of 1013 K/6 min+983 K/10 min remarkably improved the high-temperature oxidatio resistance of the Ti 3Al-based alloy.The coating microstructures after oxidation at 1173 K for 100 h were examined.It is pointed out that the improvement of oxidation resistance is attributed to the formation of a dense Al 2O 3 film on the top surface of the coated Ti 3Al-based alloy.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2005年第1期39-42,共4页
Corrosion Science and Protection Technology
基金
航空基础科学基金项目资助 ( 0 3H2 10 0 9)
